CN1180112A - Method for preparing thin tungsten powder by using molten-salt electrolysis - Google Patents

Method for preparing thin tungsten powder by using molten-salt electrolysis Download PDF

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CN1180112A
CN1180112A CN 97110408 CN97110408A CN1180112A CN 1180112 A CN1180112 A CN 1180112A CN 97110408 CN97110408 CN 97110408 CN 97110408 A CN97110408 A CN 97110408A CN 1180112 A CN1180112 A CN 1180112A
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nacl
cathode
parts
current density
kcl
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CN1057802C (en
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冯乃祥
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Abstract

The method for extracting fine tungsten powder by using fusion electrolysis technology is characterized by that its electrolyte is composed of (by weight portion) 50-85 portions of NaCl and KCl mixture, 8-40 portions of Na2WO4 and 3-8 portions of WO3; its temp. range is 560-750 deg. C; anode current density : cathode current density is 0.15-1.2 A/sq.cm; cathode material can be selected from iron, iron-based alloy, metal tungsten, metal tungsten alloy and any one kind of composite material with electrical conductivity except carbon material, and anode material can be one selected from carbon material and inert metal material.

Description

The method of preparing thin tungsten powder by using molten-salt electrolysis
The invention provides a kind of method of producing thin tungsten powder with the fused salt electrolysis technology.The electrolysis production, recovery or the refining techniques that belong to metal-powder in the field of metallurgy or porous metal bodies.
At present, in the industrial production of rare metal tungsten powder, purity and granularity relate to two important indicators of product quality grade.Because in powder metallurgy is produced, adopt the superfine metal-powder, can obtain fine and close metal and alloy.For example, can obtain fine and close tungsten and tungstenalloy.Its physicochemical property obviously improve.The fused salt electrolysis Tungsten oxide 99.999 is produced the method for tungsten powder, can obtain refining effect, and it is simple to possess technology, less investment, the advantage that cost is low.But because of failing to obtain thinner particulate always, and limited application.
Produce the above-mentioned deficiency of tungsten powder technology at existing fused salt electrolysis, the purpose of this invention is to provide and a kind ofly produce the method for particle diameter less than the thin tungsten powder of 10 μ m with the fused salt electrolysis metal oxide.
Above-mentioned purpose of the present invention, realize by following technical measures:
1. ionogen composition, by weight part
Basic ionogen
NaCl 20-80 part
KCl is supplemented to 100 parts;
Get aforementioned ratio gained NaCl, KCl mixture 50-85 part
Na 2WO 48-40 part
WO 33-8 part
LiCl 0-40 part
CaCl 20-10 part
MgCl 20-10 part
2. electrolysis temperature
According to the variation of ionogen composition, take the temperature that adapts, its temperature range is 560-750 ℃.
3. cathode current density
Cathode current density is 0.15-1.2A/cm 2
4. cathode material
Cathode material can be chosen for irony, ferrous alloy, tungsten, tungsten alloy, and perhaps the matrix material with conductivity except that carbonaceous is any.
5. anode material
Anode material can be chosen a kind of of carbonaceous material and inert metal material.
Utilize the inventive method, realized the purpose of preparation of industrialization particle diameter less than the thin tungsten powder of 10 μ m (below 10 microns).Possess that technology is simple, cost is low, the product purity advantages of higher.
Below by several embodiments, further narrate technical characterictic of the present invention:
Scheme one
1. ionogen, by weight part
NaCl 20-80
KCl mends to 100 parts;
Get 80 of NaCl, KCl mixture
Na 2WO 415 parts
WO 35 parts
2. cathode current density 0.15A/cm 2
3. electrolysis temperature is 720 ℃
4. cathode material iron staff
5. anode material graphite
6. current efficiency 92%.
Scheme two
1. ionogen, by weight part
NaCl 20-80
KCl mends to 100 parts;
Get 60 of NaCl, KCl mixture
Na 2WO 4 15
WO 35LiCl 202. cathode current density 0.2A/cm 23. 630 ℃ of 4. cathode material rod iron of electrolysis temperature, 5. anode material graphites, 6. current efficiency 91%.Scheme 3 1. ionogen, a part NaCl 20-80KCl mends to 100 parts by weight; Get NaCl, KCl mixture 75Na 2WO 420WO 352. cathode current density 0.5A/cm 23. 710 ℃ of 4. cathode material of electrolysis temperature is coated with the rod iron 5. anode material graphite schemes 4 1. ionogen compositions of layer of metal tungsten, a part NaCl 20-80KCl mends to 100 parts by weight; Get said mixture 70Na 2WO 415WO 35LiCl 20MgCl 2102. cathode current density 0.25A/cm 23. carbonaceous electrodes 6. current efficiency 93% made of 670 ℃ of 4. cathode material stainless steel of electrolysis temperature, 5. anode material refinery cokes.Scheme 5 1. ionogen compositions, a part NaCl 20-80KCl mends to 100 parts by weight; Get said mixture 80Na 2WO 415 parts of WO 35CaCl 3102. cathode current density 0.8A/cm 23. 720 ℃ of 4. cathode material of electrolysis temperature is coated with stainless steel bar 5. anode material graphites 6. current efficiency 93.5% of layer of metal tungsten.

Claims (6)

1. produce the method for thin tungsten powder with the fused salt electrolysis technology for one kind, it is characterized in that this method specifically is expressed as:
(1) the ionogen composition by weight part
Basic ionogen
NaCl 20-80 part
KCl is supplemented to 100 parts;
By aforementioned ratio gained NaCl, KCl mixture 50-85 part
Na 2WO 48-40 part
WO 33-8 part
LiCl 0-40 part
CaCl 20-10 part
MgCl 20-10 part
(2) electrolysis temperature
According to the variation of ionogen composition, take the temperature that adapts, its temperature range is 560-750 ℃.
(3) cathode current density
Cathode current density is 0.15-1.2A/cm 2
(4) cathode material
Cathode material can be chosen for irony, ferrous alloy, tungsten, tungsten alloy, the matrix material with conductivity except that carbonaceous any;
(5) anode material
Anode material can be chosen a kind of of carbonaceous material and inert metal material.
2. according to claim 1ly produce the method for thin tungsten powder, it is characterized by with the fused salt electrolysis technology:
(1) ionogen, by weight part
NaCl 20-80
KCl mends to 100 parts;
Get 80 of NaCl, KCl mixture
Na 2WO 415 parts
WO 35 parts
(2) cathode current density 0.15A/cm 2
(3) electrolysis temperature is 720 ℃
(4) cathode material iron staff
(5) anode material graphite
(6) current efficiency 92%.
3. according to claim 1ly produce the method for thin tungsten powder, it is characterized by with the fused salt electrolysis technology:
(1) ionogen, by weight part
NaCl 20-80
KCl mends to 100 parts;
Get 60 of NaCl, KCl mixture
Na 2WO 415
WO 3 5
LiCl 20
(2) cathode current density 0.2A/cm 2
(3) electrolysis temperature is 630 ℃
(4) cathode material rod iron
(5) anode material graphite
(6) current efficiency 91%.
4. according to claim 1ly produce the method for thin tungsten powder, it is characterized by: by weight part with the fused salt electrolysis technology
(1) ionogen
NaCl 20-80
KCl mends to 100 parts;
Get NaCl, KCl mixture 75
Na 2WO 4 20
WO 35 (2) cathode current density 0.5A/cm 2(3) 710 ℃ of (4) cathode materials of electrolysis temperature are coated with rod iron (5) anode material graphite of layer of metal tungsten
5. according to claim 1ly produce the method for thin tungsten powder with the fused salt electrolysis technology, it is characterized by: (1) ionogen composition, a part NaCl 20-80KCl mends to 100 parts by weight; Get said mixture 70Na 2WO 415WO 35LiCl 20MgCl 210 (2) cathode current density 0.25A/cm 2(3) carbonaceous electrodes made of 670 ℃ of (4) cathode material stainless steels of electrolysis temperature (5) anode material refinery coke
6. according to claim 1ly produce the method for thin tungsten powder with the fused salt electrolysis technology, it is characterized by: (1) ionogen composition, a part NaCl 20-80KCl mends to 100 parts by weight; Get said mixture 80Na 2WO 415 parts of WO 35CaCl 310 (2) cathode current density 0.8A/cm 2(3) 720 ℃ of (4) cathode materials of electrolysis temperature are coated with stainless steel bar (5) anode material graphite of layer of metal tungsten
CN97110408A 1997-04-11 1997-04-11 Method for preparing thin tungsten powder by using molten-salt electrolysis Expired - Fee Related CN1057802C (en)

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CN97110408A CN1057802C (en) 1997-04-11 1997-04-11 Method for preparing thin tungsten powder by using molten-salt electrolysis

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Application Number Priority Date Filing Date Title
CN97110408A CN1057802C (en) 1997-04-11 1997-04-11 Method for preparing thin tungsten powder by using molten-salt electrolysis

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CN1180112A true CN1180112A (en) 1998-04-29
CN1057802C CN1057802C (en) 2000-10-25

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101974767A (en) * 2010-10-29 2011-02-16 江西理工大学 Method for preparing tungsten powder by fused salt electrolysis
CN101985763A (en) * 2010-10-29 2011-03-16 江西理工大学 Method for preparing tungsten-base alloy powder by fused-salt electrolysis
CN1926263B (en) * 2004-11-24 2011-06-15 住友电气工业株式会社 Structure and process for producing structure
CN102127778A (en) * 2011-04-19 2011-07-20 河北联合大学 Method for preparing tungsten from WO3
WO2011092516A1 (en) 2010-02-01 2011-08-04 National Nuclear Laboratory Limited Novel method for steel production
CN102230194A (en) * 2011-07-26 2011-11-02 武汉大学 Method for preparing nano-tungsten powder from calcium tungstate
CN106222703A (en) * 2016-08-25 2016-12-14 北京工业大学 Multistep selective electrolysis reclaims the method for metal in hard alloy scraps

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1052071A (en) * 1989-11-28 1991-06-12 中南工业大学 From ammonium tungstate solution, produce the method for fine and ultrafine tungsten powder
US5125964A (en) * 1990-09-10 1992-06-30 General Electric Company Fluidized bed process for preparing tungsten powder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1926263B (en) * 2004-11-24 2011-06-15 住友电气工业株式会社 Structure and process for producing structure
WO2011092516A1 (en) 2010-02-01 2011-08-04 National Nuclear Laboratory Limited Novel method for steel production
CN101974767A (en) * 2010-10-29 2011-02-16 江西理工大学 Method for preparing tungsten powder by fused salt electrolysis
CN101985763A (en) * 2010-10-29 2011-03-16 江西理工大学 Method for preparing tungsten-base alloy powder by fused-salt electrolysis
CN101985763B (en) * 2010-10-29 2012-04-18 江西理工大学 Method for preparing tungsten-based alloy powder through molten salt electrolysis
CN102127778A (en) * 2011-04-19 2011-07-20 河北联合大学 Method for preparing tungsten from WO3
CN102230194A (en) * 2011-07-26 2011-11-02 武汉大学 Method for preparing nano-tungsten powder from calcium tungstate
CN106222703A (en) * 2016-08-25 2016-12-14 北京工业大学 Multistep selective electrolysis reclaims the method for metal in hard alloy scraps

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